Outcome of confirmed periconceptional maternal rubella.
61 pregnant women in whom confirmed rubella occurred from 5 weeks before to 6 weeks after the last menstrual period ( LMP) were followed up prospectively. In 39, the pregnancy was terminated and the fetal tissues or mixed products of conception were examined for rubella virus. In 22, the pregnancy continued to term and cord serum was tested for specific IgM antibody. No evidence of intrauterine infection was found in 38 pregnancies in which the mother's rash appeared before, or within 11 days after, the last menstrual period. The shortest interval at which fetal infection occurred was when the rash appeared 12 days after the last menstrual period. All 10 pregnancies in which the rash appeared 3-6 weeks after the last menstrual period resulted in fetal infection: 4 of these pregnancies went to term, and all 4 infants were damaged. The risk to the fetus when rubella occurs before the mother's last menstrual period is probably negligible.[1]References
- Outcome of confirmed periconceptional maternal rubella. Enders, G., Nickerl-Pacher, U., Miller, E., Cradock-Watson, J.E. Lancet (1988) [Pubmed]
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